210121223110203 has 64 divisors (see below), whose sum is σ = 299335129482240. Its totient is φ = 130649254428672.

The previous prime is 210121223110093. The next prime is 210121223110223. The reversal of 210121223110203 is 302011322121012.

It is not a de Polignac number, because 210121223110203 - 2⁸ = 210121223109947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210121223110203.

It is not an unprimeable number, because it can be changed into a prime (210121223110223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13411699776 + ... + 13411715442.

It is an arithmetic number, because the mean of its divisors is an integer number (4677111398160).

Almost surely, 2^{210121223110203} is an apocalyptic number.

210121223110203 is a deficient number, since it is larger than the sum of its proper divisors (89213906372037).

210121223110203 is a wasteful number, since it uses less digits than its factorization.

210121223110203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21076.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 210121223110203 its reverse (302011322121012), we get a palindrome (512132545231215).

The spelling of 210121223110203 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred twenty-three million, one hundred ten thousand, two hundred three".